18899332979 has 8 divisors (see below), whose sum is σ = 18933547008. Its totient is φ = 18865150920.

The previous prime is 18899332951. The next prime is 18899332987. The reversal of 18899332979 is 97923399881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18899332979 - 2²⁴ = 18882555763 is a prime.

It is a super-2 number, since 2×18899332979² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18899332909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1386254 + ... + 1399820.

It is an arithmetic number, because the mean of its divisors is an integer number (2366693376).

Almost surely, 2^18899332979 is an apocalyptic number.

18899332979 is a deficient number, since it is larger than the sum of its proper divisors (34214029).

18899332979 is a wasteful number, since it uses less digits than its factorization.

18899332979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15985.

The product of its digits is 52907904, while the sum is 68.

The spelling of 18899332979 in words is "eighteen billion, eight hundred ninety-nine million, three hundred thirty-two thousand, nine hundred seventy-nine".